# 直接使用 for 循环来遍历字典
a = {
    'name': 'zhangsan',
    'id': 1,
    'score': 90
}

for key in a:
     print(key, a[key])

print(a.keys())
print(a.values())
print(a.items())

# for key, value in a.items():
#     print(key, value)